MAX4490AUK+T - 10MHz, 10V/us Rail-to-Rail Op Amp | Analog Devices
MPN: MAX4490AUK+T ⚠ Last Time Buy| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.33 | $1.33 |
| 10 | $1.29 | $12.90 |
| 100 | $1.19 | $119.00 |
| 500 | $1.09 | $545.00 |
| 1,000 | $0.99 | $990.00 |
| 3,000 | $0.89 | $2,670.00 |
MAX4490AUK+T Overview
An operational amplifier, or op amp, is an active analog integrated circuit that amplifies the difference between two input voltages. The MAX4490 belongs to the rail-to-rail input/output amplifier family, allowing its input and output voltages to approach the supply rails. This makes it useful when the signal range and output swing requirements exceed the practical limits of conventional amplifier architectures.
Key verified features include a 10 MHz gain-bandwidth product and a 10 V/us slew rate. The device can drive 2 kOhm resistive loads to within 55 mV of either supply rail and remains unity-gain stable. Its single 5-pin SOT-23 package supports space-constrained designs, while its low-cost positioning helps reduce BOM cost in production.
The MAX4490AUK+T is built around a CMOS operational-amplifier architecture designed for low-voltage operation and broad input/output range. Its 10 MHz bandwidth supports signal conditioning at moderate frequencies, while the 10 V/us slew rate improves large-signal response. Rail-to-rail output capability is especially useful in battery-powered systems, sensor interfaces, and low-voltage audio or control circuits.
Typical applications include portable instrumentation, sensor signal conditioning, audio preamplification, low-voltage data acquisition, and general-purpose analog control. The 2.7 V minimum single-supply operation supports designs powered from 3.3 V rails, while the 5.5 V maximum supports common 5 V systems.
Designers should verify the exact pinout and package variant, maintain adequate supply bypassing, and account for the 55 mV output headroom specification when driving loads near either rail. Because the MAX4490 is listed by the manufacturer as LAST TIME BUY, sourcing plans and long-term availability should be confirmed before new production commitments.
Drop-in alternatives for MAX4490AUK+T — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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Request AlternativesMAX4490AUK+T Maximum Ratings & Electrical Characteristics
| Product Type | Single CMOS operational amplifier |
| Number of Circuits | 1 |
| Supply Voltage, Single | +2.7 V to +5.5 V |
| Supply Voltage, Dual | ±1.35 V to ±2.75 V |
| Gain-Bandwidth Product | 10 MHz |
| Slew Rate | 10 V/us |
| Input Type | Rail-to-rail |
| Output Type | Rail-to-rail |
| Load Capability | 2 kOhm resistive loads |
| Output Swing | Within 55 mV of either supply rail |
| Gain Stability | Unity-gain stable |
| Offset Voltage, Maximum | 16 mV |
| Package | 5-pin SOT-23 |
| Mounting Type | Surface Mount |
MAX4490AUK+T 5-pin sot-23 Pin Configuration Guide
Pin configuration for MAX4490AUK+T (5-pin sot-23 package). This analog component features input, output, and power supply pins. Refer to the manufacturer datasheet for offset null, compensation, and enable pin configurations. Ideal for signal conditioning and amplifier circuits.
No detailed pinout data available for MAX4490AUK+T.
Refer to the datasheet for full pin configuration.
Typical Applications
MAX4490AUK+T is suitable for 6 applications: Portable Sensor Signal Conditioning, Portable Audio Preamplification, 3.3 V Data Acquisition, Battery-Powered Analog Control, Low-Voltage Instrumentation Buffer, Industrial Low-Speed Signal Conditioning.
Portable Sensor Signal Conditioning
The MAX4490AUK+T is appropriate for low-voltage sensor front ends powered from 3.3 V or 5 V rails because it supports a single +2.7 V to +5.5 V supply and rail-to-rail input/output operation. Its 10 MHz gain-bandwidth product provides useful bandwidth for conditioning signals from resistive, capacitive, or low-frequency active sensors, while the 10 V/us slew rate helps preserve edge detail. The amplifier can sit directly after a sensor buffer or transducer where the signal may approach either supply rail. Confirm input bias current, offset, noise, and settling requirements against the sensor impedance and measurement bandwidth.
Recommended
Portable Audio Preamplification
The MAX4490AUK+T can serve as a low-voltage audio preamplifier when the design requires rail-to-rail signal handling and faster large-signal response than a general-purpose slow op amp. Its 10 V/us slew rate reduces slew-rate limiting, and the 10 MHz gain-bandwidth product allows moderate audio-band amplification and filtering stages. The 2 kOhm load capability is useful for driving downstream buffers or modest resistive networks, although headphones, loudspeakers, and other low-impedance loads may require a dedicated driver. Check output swing, distortion, and operating-volume requirements in the manufacturer data sheet.
Recommended
3.3 V Data Acquisition
For a 3.3 V data-acquisition front end, the MAX4490AUK+T offers rail-to-rail input and output capability from a verified +2.7 V to +5.5 V single-supply range. That headroom helps preserve signal range when the ADC input range approaches the system rails. The 10 MHz bandwidth is suitable for many low- or moderate-speed sensor channels, while the 10 V/us slew rate supports faster transitions. The exact acquisition application still requires checking ADC input capacitance, settling time, common-mode range, and the required sample-and-hold interface.
Recommended
Battery-Powered Analog Control
The MAX4490AUK+T is a reasonable choice for compact battery-powered analog-control blocks because it accepts a single supply down to +2.7 V and provides rail-to-rail input/output behavior. Its low-cost SOT-23-5 package helps reduce board area, and the 2.7 V minimum supply suits systems operating below the usual 5 V rail. At low supply voltage, however, designers should verify output headroom, load capability, quiescent current, and temperature behavior against the battery operating range. The supplied web data does not specify quiescent current, so that value requires confirmation from the datasheet.
Recommended
Low-Voltage Instrumentation Buffer
The rail-to-rail input capability of the MAX4490AUK+T makes it useful as an instrumentation-buffer building block in low-voltage measurement systems. Its single-supply operation from +2.7 V to +5.5 V can simplify designs that cannot use a conventional ±15 V analog supply, and unity-gain stability helps when the amplifier is used as a follower. The 10 MHz bandwidth is more than adequate for many sensor and slow instrumentation channels, but input offset, bias current, noise, and common-mode behavior must be checked for high-impedance sources. A dual or quad family variant may reduce external buffering.
Recommended
Industrial Low-Speed Signal Conditioning
The MAX4490AUK+T can be evaluated for industrial low-speed signal-conditioning blocks where a compact, general-purpose amplifier is needed. Its rail-to-rail inputs and outputs reduce signal-range restrictions in 3.3 V or 5 V control systems, while the 10 MHz bandwidth provides margin for moderate-frequency filtering and gain stages. The MAX4490AUK+T is marked LAST TIME BUY, so industrial equipment designers should avoid introducing it into new platforms without confirming lifecycle and supply continuity. Environmental ratings, ESD requirements, and long-term availability should be checked separately from the electrical specifications provided here.
Recommended
Recommended Products Summary
Engineering reference data for MAX4490AUK+T — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MAX4491 | MAX4492 |
|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices |
| Number of Circuits | 1 | 2 | 4 |
| Single Supply Range | +2.7 V to +5.5 V | +2.7 V to +5.5 V family range | +2.7 V to +5.5 V family range |
| Dual Supply Range | ±1.35 V to ±2.75 V | ±1.35 V to ±2.75 V family range | ±1.35 V to ±2.75 V family range |
| Gain-Bandwidth Product | 10 MHz | 10 MHz family specification | 10 MHz family specification |
| Slew Rate | 10 V/us | 10 V/us family specification | 10 V/us family specification |
| Input/Output Capability | Rail-to-rail input and output | Rail-to-rail input and output family feature | Rail-to-rail input and output family feature |
| Load Capability | 2 kOhm resistive loads | 2 kOhm family specification | 2 kOhm family specification |
Key Differentiators
- Single-amplifier configuration in a compact package (vs MAX4491)
- Lower circuit count than the quad family variant (vs MAX4492)
- Verified dynamic performance (vs MAX4491)
Design Notes
The verified single-supply operating range is +2.7 V to +5.5 V, with dual operation from ±1.35 V to ±2.75 V. Before layout, verify the exact supply pins and recommended bypass-capacitor arrangement in the official MAX4490 datasheet. Because this is a LAST TIME BUY device, also document the selected supplier, date code, and any approved alternate source so production does not depend on an unconfirmed supply channel.
Do not equate the family-level MAX4491 and MAX4492 descriptions with a verified drop-in replacement for the MAX4490AUK+T. MAX4491 is a dual amplifier and MAX4492 is a quad amplifier, so circuit count and package resources differ even though the supplied family information shares the 2.7 V to 5.5 V supply, 10 MHz bandwidth, 10 V/us slew rate, and 2 kOhm load capability. Confirm the exact UK+ package pinout before considering any substitute.
Place input, output, and supply connections according to the official package drawing and keep the amplifier's high-impedance input nodes short to reduce parasitic sensitivity. The rail-to-rail input/output feature does not eliminate the need for careful grounding or decoupling. Validate stability with the intended source impedance, load, cable capacitance, and feedback network, especially in instrumentation applications where the source resistance may be high.
Compliance Information
Compliance information was not explicitly included in the supplied verified data. Do not infer RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status from the manufacturer name or product category.
